Valve mechanism.



J. F. WEBB, JR. VALVEMECHANISM.

APPLICATION FILED APR.27, 1914. 1 1L161. Patented June 1, 1915.

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THE NORRIS PETERS 50.. PHOTO-LITHQ. WASHINGTON. D. r

J. F. WEBB, JR.

VALVE MECHANISM.

APPLICATION FILED APR. 21, 19l4.

Patented June 1, 1915.

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WITNESSES: 0146/ MMA Q m1,

THE NORRIS PETLK: 1.. rrwlu-u IHU WASHINGTON. b. I.

JEAN F. WEBB, JR., OF NEW YORK, N. Y., ASSIGNOR TO THE INTERNATIONAL SIGNAL COMPANY, INCORPORATED, 013 NEXV YORK, N. Y.

VALVE MECHANISM.

Application filed April 27, 1914.

To all whom it may concern Be it known that I, JEAN F. VVEBB, Jr, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Yalve Mechanism, of which the following 18 a specification.

My invention is an improved valve mechanism, particularly designed for use in automatic train stopping systems such as forms the subject-matter of my co -pending application filed on even date herewith, Serial #834,865.

In its generic nature, the invention comprises an apparatus in which provision is made for a free passage of air from the main reservoir, via the engineers control, to the train pipe proper during normal conditions, and when the automatic stop is to be effected, the main reservoir connection is closed and the train pipe connection is thrown into communication with the atmosphere to set the brakes.

Primarily, my invention has for its object to provide a valve mechanism for accomplishing the above outlined functions, quickly and effectively; to provide a mechanism in which the valve elements proper will always seat tight regardless of variations due to expansion or contraction or slight inaccuracies in machine work; to provide means for preventing an accumulation of water of condensation in the valve and thus prevent its freezing up; and to generally refine the construction so as to produce an efficient valve mechanism for the purposes stated.

In its more subordinate nature, the invention includes those novel details of construction, combination and arrangement of parts, all of which will be first fully explained and then be specifically pointed out in the appended claims, and illustrated in the accompanying drawings, in which Figure 1 is a front elevation of the mechanism, the cover of the upper section of the casing being removed. Fig. 2 is a side elevation of the parts shown in Fig. 1. Fig. 3 is a central vertical cross section, parts being shown in elevation, indicating the position of the parts under normal conditions. Fig. 4 is a diagrammatic view showing the connections between the improved valve mechanism and the air brake system. Fig. 5 is a detail perspective view of the supple- Specification of Letters Patent.

Patented June 1, 1915. Serial No. 834,866.

mental valve that controls the passage between the train pipe air chamber and the exhaust-air chamber. Fig. 6 is a detail perspective View of the main valve element that controls the passage between the main-reservoir-air chamber and the train-pipeair chamber.

In the drawings, in which like numerals of reference indicate like parts in all of the figures, 1 is the main or lower section of the casing which is provided with suitable lugs 2, through the medium of which the mechanism may be mounted on a suitable support. The casing 1 incloses three chambers 3, 4E and 5 respectively, the chamber 3 being what I shall hereinafter term the main-reservoirair chamber, the chamber 41, the train-pipeair chamber and the chamber 5, the exhaustchamber. The casing 1 is bored and tapped at the bottom and top at 6 and 7 to receive the plugs 8 and 12. The lower plug 8 is cupped at 9 to receive any water of condensation that may collect in the valve chambers, and the plug 8 is provided with a lug 10 around which the valve spring 72 is located.

11 is a packing ring by means of which an air-tight joint may be made. The plug 12 is-also provided with a packing ring 13 and it is bored at 14 to receive a gland 15 and incloses a packing chamber 16 to there by form a stulfing be); around the stem 17. The stem 17 is provided with an integral cup 18 within the chamber 5, into which a second cup 21 telescopes, the cup 21 carrying a pin that projects into vertically elongated slots 19 in the cup 18 to allow for a limited telescopic movement under the influence of the spring 23.

2425 are the webs separating the chambers 3, 41 and 5, and these webs are provided with suitable valve seats for the valves 33-29 respectively. The valve 29 has a stem 26 and is provided with guide lugs 27-28. It is also bored at 31 to receive the stem of the supplemental valve 33, the stems 3026 being cotter-pinned together through holes 32. The supplemental valve 33 has a bore 34 to receive a hardened pin 35 that is adapted to engage the bottom of the cup 21.

The chamber 4: has a duct 36 that leads to the outlet 37 to which the pipe 77 that leads to the operating mechanism of the train stop apparatus for protectmg purposes- (notshown) is connected. The chamber 3 has a. threaded port 40 into which the course, connected by a pipe 43 with the engineers control valve 44 that is in turn connected by a pipe 45 with the main reservoir 46.

47 is a port for the chamber 5 which communicates through the pipe 38 with the whistle or other suitable signal 39 to the atmosphere.

The chamber 4 is provided with a pair of diametrically disposed ports 42 that are tapped and one of which is plugged by a plug 50, while the other is connected to the pipe 48 that leads to the train pipe member 49.

The lower section 1 of the casing is provided with horizontal flange lugs 51 that register with corresponding lugs 52 on the upper section 53, the two sections being secured together by cap screws 71. The upper section 53 of the casing is provided with securing ears, 54 similar to the ears 2 of the section 1, and it is also provided with a cover 55 that is detachably secured in place by screws 56.

57 is a bearing hub in which the bearing sleeve 58 of the operating shaft 59 is rotatably mounted, the sleeve 58 being keyed to the shaft 59 by a key 60 which also serves to key the cam 70 and the collar 61 in place. Collar 61 is held from endwise movement by a pin 62.

63 is'a head that is secured at 65 on the reduced portion 64 of the stem 17. The head. 63 has a fork 66 to straddle the collar 61 and prevent lateral movement of the stem. It is also provided with another fork 67 in which the roller 68 is mounted on the stud shaft 69, to cooperate with the cam 70, it'being understood that the office of the cam 70 is to hold the. valve stem downwardly and to keep the valve 33 seated under normal conditions.

In operation, under normal conditions, the train pipe 49 may be brought into communication with the main air reservoir 46 through the engineers valve 44 at will, the

air flowing from the chamber 3, through the passage of the web 25 into the chamber 4 and from thence to the train pipe. When it is desired to set the brakes by means of the engineers valve, the air flows from the train pipe via the chamber 4, through the passage of the Web 25-into the chamber 3,

through pipes 4143 to atmosphere via the engineers valve in the usual way. When, however, the shaft 59 is turned to move the cam 70 to release the stem 17, the air pressure in the chamber 3, aided by the spring 72, will seat the valve 29 and unseat the valve 33, thereby permitting the train pipe air to be exhausted to atmosphere from chamber 4 via chamber 5, port 47, pipe 38 and whistle 39 to thereby set the brakes. Should the pipe 77 become open by breakage or otherwise, the chamber 4 will be thrown into communication with the atmosphere through the break and the air brakes will become set.

The duct 37 is for emergency protection purposes and when not used may be plugged From the foregoing taken in connection with the accompanying drawings, it is thought the complete construction, operation and advantages of my invention will be readily understood by those skilled in the art to which it appertains.

What I claim is:

1. In a valve mechanism, a casing inclosing a plurality of chambers, a valve element controlling communication between said chambers, a valve stem including telescoping bodies projected into one chamber to engage said valve element, means continuously tending to unseat said valve element, and means cotiperative with the stem for holding said valve element seated said last named means including a cam shaft and an operative connection between said stem and said cam shaft.

2. In a valve mechanism, a casing inclosing a plurality of chambers, a valve element controlling communication between said chambers, a valve stem projected into one chamber to engage said valve element, means continuously tending to unseat said valve element, and means cooperative with the stem for holding said valve element seated, said stem including a yieldable body that operatively engages said valve element.

3. In a valve mechanism, a casing inclosing a plurality of chambers, a valve element controlling communication between said chambers, a valve stem projected into one chamber to engage said valve element, means continuously tending to unseat said valve element, and means coiiperative with the stem for holding said valve element seated, said stem including a cup, a second cup telescoping said stem cup, means limiting the telescopic movement between said cups, and a spring continuously tending to force said cups apart, said second cup being operatively engaged with said valve element.

4. In a valve mechanism, a casing inclosing a plurality of chambers, a valve element controlling communication between said chambers, a valve stem projected into one chamber to engage said valve element, means continuously tending to unseat said valve element, and means coiiperative with the stem for holding said valve element seated, said stem including a cup, a second cup telescoping said stem cup, means limiting the telescopic movement between said cups, a spring continuously tending to force said cups apart, and a contact pin carried by said valve element and operatively engaging said second cup.

5. A valve mechanism including a casing, said casing inclosing a plurality of chambers, valved passages between said chambers, separable valve elements controlling said passages, means for coupling said valve elements together whereby when one passage is closed the other will be open and vice versa, means continuously tending to seat one of said valve elements, a stem adapted to engage the other of said valve elements, and means engaging said stem to hold said other valve element seated.

6. A valve mechanism including a casing, said casing inclosing a plurality of chambers, valved passages between said chambers, valve elements controlling said passages, means for coupling said valve elements together whereby when one passage is closed the other will be open and vice versa, means continuously tending to seat one of said valve elements, a stem adapted to engage the other of said valve elements, and means engaging said stem to hold said other valve element seated, said stem having a yieldable portion.

7. A valve mechanism including a casing, said casing inclosing a plurality of chambers, valved passages between said chambers, valve elements controlling said passages, means for coupling said valve elements together whereby when one passage is closed the other will be open and vice versa, means continuously tending to seat one of said valve elements, a stem adapted to engage the other of said valve elements, and means engaging said stem to hold said other "alve element seated, said stem including a pair of bodies telescoping one another, and a spring within said bodies continuously tending to separate the same and a pin and slot connection between said bodies to limit their telescopic movement.

8. A valve mechanism including a casing, said casing inclosing a plurality of chambers, valved passages between said chambers, valve elements controlling said passages, means for coupling said valve elements together whereby when one passage is closed the other will be open and vice versa, means continuously tending to seat one of said valve elements, a stem adapted to engage the other of said valve elements, and means engaging said stem to hold said other valve element seated, said continuously tending seating means comprising a spring, a plug tapped into said casing and having a lug to receive said spring and having a condensation collection pocket.

9. A valve mechanism including a casing, said casing inclosing a plurality of chambers, valved passages between said chambers, valve elements controlling said passages,

means for coupling said valve elements together whereby when one passage is closed the other will be open and vice versa, means continuously tending to seat one of said valve elements, a stem adapted to engage the other of said valve elements, and means engaging said stem to hold said other valve element seated, said stem including a pair of, bodies telescoping one another, a spring within said bodies continuously tending to separate the same, a pin and slot connection between said bodies to limit their telescopic movement, said continuously tending seating means comprising a spring, and a plug tapped into said casing and having a lug to receive said spring and having a condensation collection pocket.

10. In a valve mechanism of the character described, a casing including a lower section having three chambers and webs separating said chambers, said webs having valve seat passages, a main element and a supplemental valve element operating in said chambers, said main valve element controlling the passage between the lower chamber and the intermediate chamber, said supplemental valve adapted to control the passage between said intermediate chamber and the upper chamber, means connecting said valve elements together whereby when one is seated the other will be unseated, said means including telescoping valve stems and a connection between the same, said casing having its upper and lower ends bored and tapped, plugs secured in said bored and tapped ends, the lower plug including a condensation collection pocket, a spring mounted between said lower plug and said main valve and continuously tending to seat said main valve, a gland carried by said upper plug, said upper plug and gland being bored to form a stem passage, a valve stem projecting through said stem passage into the upper chamber, a body carried by said stem and having limited telescopic movement, said body adapted to operatively engage said supplemental valve element, a head on said stem, a rotatable cam shaft, a cam on said cam shaft, a cam roller on said head to engage said cam, said head being forked to embrace said cam, said head including a second fork to embrace said shaft, a supplemental casing portion having a bearing for said shaft and a cover inclosing said cam and said stem head, all being ranged substantially as shown and described.

11. In a valve mechanism, a casing inclosing a plurality of chambers, a valve element controlling communication between said chambers, a valve stem including telescoping members projected into one chamber to engage said valve element, and means cooperative with the stem for holding said valve element seated, said last named means including a cam shaft and an operative connection between shaft. a 7

12. In a valve mechanism, a casing inclosing a plur'alityof chambers, a valve element controlling communication between said chambers, a valve stem projected into one chamber to engage said valve element, and means cooperative with the stem for holding said valve element seated, said stem includinga yieldable body that operatively engages said valve element.

13. In a valve mechanism, a casing inclosing a plurality of chambers, a valve element controlling communication between said chambers, avalve stem projected into one chamber to engage said valve element, and means cooperative with the stem for holding said stem and said cam said valve element seated, said stem includmg a cup, a second cup telescoping said stem cup, means limiting the telescopic movement between said cups, and a spring continuously tending to force said cups apart, said second cup being operatively engaged with said valve element.

1% In a valve mechanism, a casing inclosing a plurality of chambers, avalve element controlling communication between said v chambers, a valve stem projected into one chamber to engage said valve element, and means cooperative with the stem for holding said valve'element seated, said stem including a cup, a second cup telescoping said 7 stem cup, means limiting the telescopic movement between said cups, and a spring continuously tending to force said cups 7 apart, and a contact pin carried by said 7 valve element and operatively engaging said second cup. I

15. A valve -mechan1sm lncludlng a casing, said casing inclosing a plurality of chambers, valved passages between said chambers, separable valve elements controlling said passages, means for coupling said valve elements together whereby when one passage is closed, the other will be open and vice versa, a stem adapted to engage one of said valve elements, and means engaging said stem to hold the said valve element seated.

16. A valve mechanism including a casing, said casing inclosing a plurality of chambers, valved passages between said chambers, valve elements controlling said passages, means for coupling said valve elements together whereby when one passage is closed, the other will be open and vice versa, a stem adapted to engage one of said valve elements, and means engaging said stem to hold said valve element seated, said stem having a yieldable portion.

17. A valve mechanism including a casing, said casing inclosing a plurality of chambers, valved passages between said chambers, valve elements controlling said passages, means for coupling said valve elements together whereby when one passage is closed, the other will be open and vice versa, a stem adapted to engage one of said valve elements, and means engaging said stem to hold said valve element seated, said stem including a pair of bodies telescoping one another, a spring within said bodies continuously tending to separate the same and a pin and slot connection between said bodies to limit their telescopic movement.

18. A valve mechanism including a casing, said casing inclosing a plurality of chambers, valved passages between said chambers, valve elements controlling said passages, means for coupling said valve elements together whereby when one passage is closed, the other will be open and vice versa, a stem adapted to engage one of said valve elements, means engaging said stem to hold said valve element seated, and a plug tapped into said casing and having a condensation collection pocket.

JEAN r. WEBB, JR.

Witnesses:

JEAN F. WEBB, R. W. GUNTHER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

